Center start surface wind reel with automatic cut-off and transfer

ABSTRACT

Center start surface wind reel for continuously winding webs of paper and the like and automatically cutting and transferring the web to a new core and then from center to surface winding. A core shaft and spool are supported on primary transfer arms. A lay-on roll envelops the spool with the web for center winding and lays the web on the spool. The spool may be driven by torque applied at its axis by an extensible drive connection, which may be a belt drive. As center winding of the spool is completed, the primary transfer arms transfer the spool to secondary transfer arms which maintain the roll in contact with a surface winding drum. During completion of the surface winding of a roll, a knife is brought to sever the web as the first or lay-on roll is in nip engagement with the spool and to tuck the web in the nip between the lay-on roll and spool to effect winding of the web on the spool by a center drive. The primary transfer arms supporting the web move the core along a cam with the roll free from the winding drum to initiate a transfer operation for surface winding. Prior to and during transfer, cams form tracks for the core and retain the spool just out of contact with the winding drum to accommodate winding of the spool as the spool is transferred to the surface of the surface winding drum, to be wound thereby. The web may be adhered to the spool by static electricity between the lay-on roll and spool.

United States Patent [191 Melead CENTER START SURFACE WIND REEL WITH AUTOMATIC CUT-OFF AND TRANSFER [75] Inventor: James J. Melead, Roscoe, Ill.

[73] Assignee: Beloit Corporation, Beloit, Wis.

[22] Filed: Aug. 9, 1973 [21] Appl. No.: 387,122

[52] US. Cl. 242/56 R; 242/65 [51] Int. Cl B65h 19/20; B65h 17/08 [58] Field of Search 242/56 R, 56 A, 64, 65, 242/75.3, 75.53

[56] References Cited UNITED STATES PATENTS 2,787,427 4/1957 Marczinczin 242/56 A 2,860,839 11/1958 Bower 242/64 2,942,796 6/1960 Gurney et al. 242/56 A 3,163,066 12/1964 Beaulieu 242/56 R X 3,202,374 8/1965 Phelps 242/65 3,258,217 6/1966 MacArthur 242/65 3,297,716 10/1966 Hyck 242/56 R 3,345,009 10/1967 Rockstrom... 242/56 A 3,365,141 1/1968 Soloduk 242/65 X 3,614,011 10/1971 Karr 242/64 3,630,462 12/1971 Nordgren 242/56 A Primary ExaminerEdward J. McCarthy Attorney, Agent, or Firml-lill, Gross, Simpson, Van Santen, Steadman, Chiara & Simpson [451 June 17, 1975 5 7] ABSTRACT Center start surface wind reel for continuously winding webs of paper and the like and automatically cutting and transferring the web to a new core and then from center to surface winding. A core shaft and spool are supported on primary transfer arms. A lay-on roll envelops the spool with the web for center winding and lays the web on the spool. The spool may be driven by torque applied at its axis by an extensible drive connection, which may be a belt drive. As center winding of the spool is completed, the primary transfer arms transfer the spool to secondary transfer arms which maintain the roll in contact with a surface winding drum. During completion of the surface winding of a roll, a knife is brought to sever the web as the first or lay-on roll is in nip engagement with the spool and to tuck the web in the nip between the lay-on roll and spool to effect winding of the web on the spool by a center drive. The primary transfer arms supporting the web move the core along a cam with the roll free from the winding drum to initiate a transfer operation for surface winding. Prior to and during transfer, cams form tracks for the core and retain the spool just out of contact with the winding drum to accommodate winding of the spool as the spool is transferred to the surface of the surface winding drum, to be wound thereby. The web may be adhered to the spool by static electricity between the lay-on roll and spool.

14 Claims, 6 Drawing Figures PATENTEI] JUN 1 7 I975 SHEET PATENTEDJUN17 ms SHEET FIG. 2

CENTER START SURFACE WIND REEL WITH AUTOMATIC CUT-OFF AND TRANSFER FIELD OF THE INVENTION Winding apparatus for webs of paper and like mate rial of the type found in Class 242, Sub. 56.

PRIOR ART, BACKGROUND AND SUMMARY OF THE INVENTION Heretofore, webs of paper, plastic and like materials have been wound on spools carried by core shafts by driving the core shaft to wind the spool from the center of the shaft and provide a tightly wound core and have been transferred to a surface winding drum for completing the winding operation by surface winding. The transfer from the center to surface winding is made because center winding to build up the roll to its required diameter is unduly expensive and requires heavy machinery and complicated guides to guide the web to the roll as it builds up when wound through its center, and sophisticated controls for attaining uniform tension on the web and a uniformly wound roll as the drive moment increases, as the roll builds up in size.

A center and surface wind web winder is shown and described in US. Pat. No. 3,202,374 dated Aug. 24, 1965. With such winders, the affixing of the web to the spool must be done by hand or by adhesively coating the spool and the apparatus is not suited for center winding of the web without glue.

The winding apparatus of the present invention is an improvement on that of the Phelps Pat. No. 3,202,374 in that it provides an enveloper roll arranged to lay a sheared web on a spool carried by primary transfer arms and to envelop the spool with the web so it may be laid on the spool without glue, to accommodate center winding without glue. The primary arms further have cam tracks associated therewith conforming to the periphery of the surface winding drum and engaging and supporting the core as transferred by the primary arms from center to surface winding.

A Patent to Gerald W. Karr No. 3,614,011 shows a surface winder in which primary arms transfer a core and spool about a surface winding drum to cradles on the upper ends of secondary arms, biasing the core and web wound thereon toward the winding drum and accommodating movement of the drum along the support rails upon build-up in roll diameter, in which the core is supported on cams extending partially about the surface winding drum and contoured to support the spool out of contact with the surface winding drum for discharge in the cradles of the secondary arms. This winder, however, is only arranged to carry out a surface winding operation and has no provisions for enveloping the spool with the web and adhering the web to the spool for center winding, nor are there any provisions for automatically cutting the web as the surface wound roll is built up to size and the spool is delivered to the cradles to initiate a new surface winding operation of a next succeeding winding drum.

The winding apparatus of the present invention overcomes the foregoing disadvantages in winding webs of paper by providing primary and secondary transfer arms for center start winding of a spool, and surface build up of the roll to size and by providing an enveloper roll enveloping the web on the spool on the primary transfer arms to place the web on the spool without glue, and a surface winding drum spaced from the enveloper roll with a knife between the enveloper roll and surface winding drum automatically coming into cutting contact with the web as a roll is surface wound to size, and accommodating the knife to cut the web as it passes through the nip between the spool and enveloper roll. The knife and enveloper roll wrap the web about the spool for center winding to provide a tight center wound start of the web on the spool and accommodate build up of the web on the spool by surface winding.

An advantage of the present invention is that the proven methods of center start and transfer for surface winding may be utilized and all of the operations including the cutting and laying on the web on a new spool, may be carried out automatically without glue.

A further advantage of the invention is the novel combination of center and surface winding methods and allowing transfer of the web to the spool to be carried out more simply than under surface starting and winding, by making the transfer of the web to the spool by instantaneously severing and transferring the web into the nip between the lay-on roll and spool.

A further advantage of the winding apparatus and system of the present invention is the arrangement of the apparatus to accommodate a large portion of the surface area of a surface winding drum to be used for transferring a center start spool for surface winding, while the operator is behind the winder.

A further advantage of the'invention is in the simple drive to the spool, and the arrangement and spacing of the lay-on roll and surface winding drum in such a manner that the space between the spool and surface winding drum can be utilized to cut off the web and start the web around the spool.

A further advantage of the invention is the facilitation of hard-center winding and the transfer of hardcenter winding to surface winding and building the roll up to size by surface winding by enveloping a winding spool and driving the spool through a slip drive, and by supporting the spool off the surface of the winding drum during transfer from center to surface winding.

A still further advantage of the invention is the provision of a belt drive for the spool, driving the spool through its center as transferred from center to surface winding.

Other objects, features and advantages of the invention will be readily apparent from the following description of a preferred embodiment thereof, taken in conjunction with the accompanying drawings, although variations and modifications may be effected without departing from the spirit and scope of the novel concepts of the disclosure.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagrammatic view in side elevation of a winding apparatus constructed in accordance with the principles of the present invention and showing the apparatus in a load and run position.

FIG. 2 is a diagrammatic view in side elevation showing the apparatus of FIG. 1 with the apparatus in a cut position severing the web as wound on the roll built up to size and accommodating the tucking of the web between the lay-on roll and a new spool supported on primary transfer arms.

FIG. 3 is a diagrammatic view in side elevation similar to FIGS. 1 and 2, but showing the lay-on roll moved out of engagement with the center wound spool to accommodate transfer of the spool for surface winding.

FIG. 4 is a fragmentary diagrammatic view illustrating the cut position of the cut-off knife relative to the spool and lay-on roll in which the cut-off knife is slightly modified from the showing of FIGS. 1 through 3 and has a sponge on the inner side thereof for smoothing the web as enveloped about its spool.

FIG. 5 is a fragmentary diagrammatic view showing a further step from that shown in FIG. 1, with the cutting of the web cut and tucked in the nip between the lay-on roll and spool and enveloping the spool.

FIG. 6 is a diagrammatic view illustrating a belt drive to the spool, driving the spool for center winding and bringing the spool up to the speed of the surface winding drum as passing therealong and moving into position to build the web on the drum up to roll size by surface winding.

DESCRIPTION OF PREFERRED EMBODIMENT OF INVENTION In FIGS. 1 through 6 of the drawings, I have shown a center start surface winder 10 constructed in accordance with the principles of the present invention. The surface winder 10 as shown includes an enveloper or lay-on roll 11 and a surface winding drum 12 horizontally spaced from said enveloper roll and supported on a stand or frame 13 in bearing boxes 15 extending upwardly of the top of said frame. The enveloper roll 11 may be freely rotatable or may be driven by power where it is desired to assist in the start of center winding while the surface winding drum may be driven at a constant rate of speed, to drive a spool 16 having a web 17 partially wound thereon, by surface winding in a conventional manner.

It should here be understood that the showing of the winder is diagrammatic and that only one side of the winder is shown herein, but the supports for the various rolls and mechanisms of the winder are at opposite sides of the winder and are substantially the same on each side, except where a roll or drum may be driven from an end which cannot be shown on the side of the winder shown herein.

Where the roll 11 is driven by power to assist in the start of a winding operation, the drive may be a controlled drive, driving the roll at web speed and may be of a form well-known to those skilled in the art and not herein shown or described since it forms no part of the present invention.

The spool 16 having a web wound thereon by center winding to provide a hard center is delivered to the surface winder drum 12 for surface winding by primary transfer arms 18 pivotally movable about the axis of the winder drum 12, to secondary transfer arms 19 spaced inwardly of parallel spaced rails 20. Said rails 20 are supported at their inner ends on the top of the frame 13 and extend from said frame in a direction away from the drum 12 and are supported at their outer ends on support frames 21. The secondary transfer arms 19 maintain the spool and web wound thereon into engagement with the surface of the winder drum 12 and accommodate movement of the spool away from said winder drum as the web builds up on said spool until the roll is built up to roll size. The secondary arms may then transfer the roll to the end of the rails 20 for further treatment, such as crimping and wrapping and the placing of heads on opposite ends of the crimped wrapper. The drive to the surface winding drum 12 may be through a motor (not shown) and geared drive connection and may be of various well-known forms which are no part of the present invention so need not herein be shown or described further.

The web 17 is trained from a suitable source about a pair of freely rotatable tension rolls 22 and 23 over the enveloper roll 11, about the periphery of the spool 16 to and along the periphery of the surface winding drum 12 and wound about the spool 16 by surface winding under tension.

The rolls 22 and 23 in cooperation with the enveloper roll 11 form a Z-frame tension device, and maintain the web under the required tension for winding in the form of a drum on principles similar to that shown and described in my US. Pat. No. 3,692,251 dated Sept. 19, 1972, the disclosure of which is incorporated herein by reference. The tensioning apparatus includes an upright frame 23a having bearing supports 24 extending therefrom in a direction away from the enveloper roll 11 and forming bearing supports for the roll 22 supporting said roll for free rotation relative to the frame 23a.

The roll 23 is supported at its opposite ends on the upper ends of swing arms 25 transversely pivoted at their lower ends on bearing supports 26 extending from the same side of the frame 23a as the bearing supports 24. The swing arms 25 are moved relative to the frame 230 in tension take-up or relief directions by fluid pressure operated means, shown as comprising cylinders and pistons 27, each of which is pivoted at the head end thereof on an upright support 29, and has a piston rod 30 extensible therefrom and transversely pivoted to the swing arms 25, as by a pivot pin 31.

A control arm 32 is pivoted to each swing arm 25 coaxial with the axis of the roll 23. The control arms 32 extend inwardly of the tensioning roll 22 and form bearing supports for opposite ends of the enveloper roll 11. The control arms 32 and bearing supports for the roll 11 may be guided for movement along swing arms 33 spaced on the opposite sides of the frame 23a from the swing arms 25, and pivoted thereto on bearing supports 35 extending inwardly of the frame 23a adjacent the upper end portion thereof. The control arm 32 and bearing supports for the enveloper roll 11 are adjustably moved along the swing arms 33 in accordance with the sequence of winding by fluid pressure operated cylinder and piston means 36, transversely pivoted at their head ends to the swing arms 33 as by pivot pins 37, and having piston rods 39 extensible therefrom and pivoted at their lower ends to ears 40, extending upwardly of the control arms 32, on pivot pins 41. The upper ends of the arms 25 and the lower ends of the arms 33 are connected to move together about their axes by the control arms 42 pivotally connected at their opposite ends to adjacent free ends of said arms 25 and 33.

A knife shown in FIG. 1 as being in the form of a pair of parallel spaced arcuate scythe-like arms 43 having a blade 44 on the ends thereof and extending across the winder is provided to sever the web as an advance spool is surface wound to drum size and to accommodate the web to be tucked in the nip between the incoming spool 16 and the enveloper roll 11. The blade may be electrically energizable (not shown) to provide a hot blade for certain materials. Two sets of knives may be provided to sever the web from the center to the edges of the web. Where two knives are used, the knives may overlap at the center of the web.

In FIGS. 4 and 5, I have shown a sponge 45 smoothing the web and thereby holding the web from wrinkling, in addition to guiding the web to pass in the nips between the enveloper roll 11 and spool 16 immediately upon transversely cutting the web. A brush (not shown) may be substituted for the sponge 45. Air jets (not shown) may also serve to tuck and smooth the web for center winding.

The knife arms 43 are transversely pivoted to the frame 23a on pivot pins 46 mounted on bearing supports 47 extending inwardly of the frame 23a beneath the enveloper roll 11. The knife is operated by fluid pressure cylinders 48 having pistons (not shown) therein, and pivoted at their head ends to the frame 23a on pivot pins 49. Piston rods 50 are extensible from said cylinders and are transversely pivoted to ears 51, extending from the individual knife arms 43 as by pivot pins 52. In FIGS. 1-3, the primary transfer arms 18 are pivotally mounted at each end of the surface winder drum 12 for free pivotal movement about the axis thereof and are shown as being rotatably driven about the axis of the winder drum 12 by meshing spur gears 53. The spur gears 53 may be driven by a suitable motor and geared reduction drive, driving a shaft 54 forming a mounting for the meshing gears 53, meshing with the gears coaxial with the winder drum 12. The drive to the shaft 54 and meshing spur gears 53 is no part of the present invention and may be of a selflocking type or may have a brake incorporated in the drive to hold the primary transfer arms 18 in selected positions of adjustment.

The primary arms 18 pivotally mounted at each end of the surface winding drum 12 are similar to those shown and described in U.S. Pat. No. 3,614,011 dated Oct. 19, 1971 and are driven together from the shaft 54 through the meshing spur gears 53. Each primary transfer arm 18 has an inwardly opening guide (not shown) extending therealong and forming a guide for a holding jaw 55. The jaw 55 has an open recessed portion opening to the drum 12 and engageable with a bearing housing 56 for the spool 16, to move said spool about the axis of the drum 12 from the cut position of said spool along curvilinear cam surfaces 57 to the rails 20 as shown in FIG. 1. The holding jaw 55 is moved into engagement with the bearing housing 56 of the spool 16 by operation of a piston rod 58 extending from a piston (not shown) within a cylinder 59, to move the holding jaw along its guides, to accommodate loading of the spool onto said primary transfer arms and release of the spool as deposited upon the horizontal rails 20. The bearing housings for the spool 16 form a support for the spool on suitable bearings contained within the bearing housings, and ride along the cam surfaces 57 of the cam tracks 60 as the spool is transferred to the secondary transfer arms 19.

The curvilinear cam surfaces 57 are formed along the upper sides of cam tracks 60 pivoted at their upper or outgoing ends on the ends of the arms 60a on a pivot pin 61. The arms 60a are mounted at opposite ends of the drum 12 and support the cam tracks 60 for movement in an arcuate path spaced radially of the periphery of the winder drum 12. The cam tracks 60 are held in position or moved toward and from the drum 12 in accordance with the loading and transfer positions of the arms 18 by cylinders 62 pivoted at their head ends to opposite sides of the frame 13, as by individual transverse pivot pins 63. A piston (not shown) within each cylinder 62 has a piston rod 64 extending therefrom and extensible from the piston rod end of the associated cylinder. Said piston rods 64 are pivotally connected at their outer ends to the lower ends of the cam tracks 60 as by transverse pivot pins 65. The piston rods 64 may thus be extensibly or retractably moved relative to the cylinders 62 to position the cam tracks in proper position to pick up the spool 16 as moved from its cut position and into position to support the periphery of the spool free from the surface of the winder drum 12 and to accommodate the spool 16 to come into contact with the surface winder drum 12 as moved therealong to be deposited onto the rails 20.

The secondary transfer arms 19 may be like those shown and described in the aforementioned US. Pat. No. 3,614,011 and incorporated herein by reference. Said arms 19 each generally include a forked upper end portion forming a cradle for the spool and having an upright arm 66 having a roller 67 thereon engageable with the bearing housing of the spool, and pressing the spool and web wound there'on into engagement with the surface of the winding drum 12, and releasing the spool as the web is built up on the winding drum to roll size.

The secondary arms 19 are pivoted to the base for the apparatus on bearing supports 70 extending upwardly from the base on pivot pins 71. Fluid pressure cylinders 73 are transversely pivoted to ears 74 extending from the outgoing side of the support 21 on pivot pins 75. Pistons (not shown) within said cylinders have piston rods 76 extending therefrom and extensible from said cylinders. The piston rods 76 each have connection with a secondary arm 19, as by a pivot pin 77. The cylinders 73 and piston rods 76 move the primary arms 18 toward and from the winding drum 12 and bias the partially wound spool into engagement with the winding drum 12, to provide the drive force to build the roll up to size.

As the web is cut by the blade 44, as shown in FIG. 2, and smoothed and tucked into the nip between the lay-on roll 11 and spool 16, a center drive to the spool may come into effect, rotatably driving the spool to wind a web thereon. The center drive may be through a suitable electric motor, either a constant speed or variable speed motor or a torque clutch motor and may be through a suitable drive connection, which may be a reduction geared drive connection including a slip clutch or may be a mechanical drive driven from the main drum or a belt drive as shown in FIG. 6. The drive otherwise is not herein shown or described since it may be of various conventional forms. The spool may be driven at a substantially constant torque or at a variable torque to start the winding of the web on the spool at a relatively high tension to obtain a smooth, tight, hard start of the roll of material on the core and then to gradually taper off as the roll builds up to a larger diameter ready for transfer. The means for driving the spool 16 through its center may thus be of various wellknown forms and may drive the spool from the cut position shown in FIG. 2 and as moved along the cam surfaces by the primary arms 18 about the driving drum for depositing on the rails 20. The various forms of drives mentioned are well known to the art so need not herein be shown or described further.

Where the spool is center-driven as moved along the cam surfaces by the primary arms 18, the spool is held just free from the periphery of the winding drum 12 to accommodate free winding of the web on said spool during transfer. Where the drive is a variable speed drive, it may increase the speed of rotation of the spool and web wound thereon to the peripheral speed of the winding drum 12 to be wound to roll size as delivered to the secondary arms 19.

One form of drive connection which may advantageously be used as a center wind drive is a belt drive connection which may form a slip drive upon excessive tensioning of the web. Such a drive is suitable for driving the spool 16. The drive of FIG. 6 is at the opposite side of the apparatus from that diagrammatically shown in the drawings and includes a pulley 88 having driving connection with a core shaft (not shown) for the spool 16 for driving the spool by drive torque applied about the axis of rotation of said spool. The drive connection from the pulley to the core shaft may be of various forms well-known to those skilled in the art, so need not be shown or described herein. The pulley 88 is engaged with an endless belt 90 which may be a flat belt or a V-belt. The belt is trained partially about a drive pulley 93 herein shown as coaxial with the winding drum 12 and driven therefrom. The pulley, however, may be driven from an independent motor and speed reducer, or in various other well-known manners. As shown by broken lines in FIG. 6, when the spool is in the cut position of the web, the pulley 88 will maintain a bight in the belt as the belt is trained about an idler 92 and about said drive pulley 93. From the drive pulley 93, the belt is trained downwardly and inwardly to and about a tension idler 95. The tension idler 95 forms a fluid pressure loaded take-up and accommodates the pulley 88 to form a bight between the drive pulley 93 and idler 92. The take-up idler 95 is operable to extend the belt from the dotted-line position shown in FIG. 6 to the solid-line position in this figure in which position the drive pulley 88 will have been moved free from the belt by the primary transfer arms 18, not shown in FIG. 6 in order to simplify the showing of the drive. The take-up idler 95 is mounted between pivoted take-up arms 96 pivoted on a transverse shaft 97 mounted in bracket means 98 extending upwardly from the base for the machine. A fluid pressure cylinder 99 having a piston rod 100 extensible therefrom serves to bias the take-up arms 96 and take-up idler 95 in the solid-line position shown in FIG. 6 and to accommodate movement of said take-up arms and idler to the position shown by broken lines in FIG. 6. The cylinder may be air-loaded or loaded by hydraulic fluid under pressure and may be so loaded that the tension on the belt 90 is uniform in the extended and retracted positions of said belt.

With the drive just described, the drive pulley 88 will be in the bight of the belt 90 when the spool is in the position shown in FIG. 2 to drive the spool 16. The spool 16 will thus be driven by force applied about its center and wind the web on the spool by center drive, to provide a tight start. The drive may continue as the spool is transferred along the arcuate cam surfaces of the cam tracks 60, until the spool reaches the top of the cam tracks at which time the roll is transferred for surface winding. The belt drive may bring the linear speed of the center wound spool up to the linear speed of the winding drum 12 to accommodate the driving of the partially wound roll by the winding drum 12 as transferred from the cam tracks to the secondary transfer arms 19 and rails 20.

After the cut and transfer of the web to a new spool 16 as shown in FIG. 2, the cam surfaces 57 of the cam tracks 60 are retracted toward the drum 12 so that the center driven spool 16 can begin surface winding as shown in FIG. 3. The belt may or may not be relaxed in tension so that the center wind drive in essence is reduced in torque as surface winding takes over the winding function.

I claim as my invention:

1. In an apparatus for winding a web of sheet material and transferring the web from an initial center to surface winding during the winding operation, a spool for the web, a surface winding drum, power means rotatably driving said surface winding drum at the speed of linear travel of the web, a pair of primary arms for carrying said spool for rotation about an axis parallel to and spaced radially from the surface of said surface winding drum and moving said spool about the axis of said surface winding drum into position to be wound from the surface thereof, support means supporting said spool in said primary arms out of contact with said surface winding drum and bringing said spool and the center wound web thereon into engagement with said surface winding drum, power means rotatably driving said spool, means for severing the web at the termination of a surface winding operation, a nip defining enveloper roll'cooperating with said winding drum to partially envelop the spool with the web, tensioning means for the web as trained about said nip defining enveloper roll, the tensioning means including a pair of swing arms pivoted for movement about an axis spaced from the axis of said nip defining roll, means supporting said nip defining enveloper roll on said swing arms, a second pair of swing arms pivotally mounted for movement about an axis spaced beneath and at the incoming side of said nip defining enveloper roll, a tension roller supported on said second swing arms adjacent the upper ends thereof, a link pivotally connecting the adjacent ends of said swing arms to swing together, an idler freely rotatable about a fixed axis spaced on the same side of the axis of said tension roll as the axis of pivotal movement of said first-mentioned swing arms, and fluid pressure means for moving said swing arms and tension roll relative to said idler.

2. The apparatus of claim 1, wherein the means supporting said nip defining roll on said first-mentioned swing arms includes means for moving said nip defining roll along said swing arms in accordance with the positions of said swing arms relative to said primary transfer arms.

3. The apparatus of claim 1, in which the means for adjustably supporting said nip defining roll on said firstmentioned swing arms comprise fluid pressure operated cylinder and piston means.

4. The apparatus of claim 3, wherein the fluid pressure operated means for moving the swing arms relative to the'spool comprise fluid pressure cylinder and piston means operable to move said swing arms into position to position said nip defining roll to envelop the spool with the web.

5. The apparatus of claim 4, wherein smoothing means extend between said knife arms beneath and along the knife supported thereby for tucking the web to completely envelop said spool and smooth the web as wound thereon.

6. The apparatus of claim 1, wherein the power means for rotatably driving said spool from its axis as supported by said primary arms comprises an extensible slip belt drive.

7. The apparatus of claim 6, wherein the slip belt drive includes a spool drive pulley coaxial with the spool and having driving connection therewith, an endless belt having a drive pulley and an idler pulley training the belt to extend beyond opposite sides of said spool drive pulley and a tension idler accommodating said spool drive pulley to form a bight between said belt drive pulley and said idlers as the spool is in a retracted position, and accommodating retraction of said bight during transferring movement of said spool by said primary arms to said surface winding drum.

8. The apparatus of claim 7, wherein the tension idler is loaded by fluid under pressure to maintain a uniform tension on the belt in the various positions of the spool drive pulley relative to the winding drum during transfer of the spool to be wound by surface winding.

9. The apparatus of claim 8, wherein the tension idler is rotatably mounted between movable take-up arms, wherein the take-up arms are pivoted for movement about a fixed axis at their ends opposite the take-up idler and wherein fluid pressure cylinder and piston means hold said arms in position about their pivotal axes and provide a pressure loading means for said tension idler.

10. The winding apparatus of claim 1, wherein the support means at the incoming side of said winding drum comprise cam means supporting the spool out of contact with said winding drum as moved by said primary arms about said winding drum to index the spool from center to surface winding.

11. The apparatus of claim 10, wherein the cam means have arcuate cam faces spaced radially from said winding drum and means are provided for selectively moving said cam faces relative to the periphery of said winding drum to position said spool and the web thereon for surface winding to the required diameter.

12. The apparatus of claim 11, wherein the cam means are pivotally mounted at opposite ends of said winding drum for movement about transverse axes spaced above and radially of said winding drum, and wherein fluid pressure means are provided to move said cam means about said pivotal axes toward and from said winding drum in accordance with the position of said spool and primary arms relative to said winding drum, to maintain the spool and web thereon free from said winding drum during center winding.

13. The apparatus of claim 12, including primary fluid pressure means biasing said primary arms to vary the pressure of engagement of the roll being wound on said spool with said winding drum in accordance with build-up of the roll.

14. The apparatus of claim 13, wherein a cut-off knife is disposed between said nip defining enveloper roll and said winding drum and comprises a pair of pivoted curved scythe-like arms partially encircling the spool when in position for severing of the web and having a knife blade extending thereacross, and fluid pressure means pivotally connected with said arms for moving said arms and knife blade about the pivotal axis of said arms to slit the web as said nip defining roll is in nip engagement with said spool.

UNITED STATES PATENT AND TRADEMARK OFFICE CERTIFICATE OF QORRECTION PATENT NO. ,892

DATED June 17, 1975 INVENTOR(5) James J. Melead it is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 8, line 51, "claim 1" should read -claim 2-.

Signed and Scaled this ninth Day Of September 1975 [SEAL] Attest:

i RUTH C. MASON C. MARSHALL DANN i Arresting Officer (mnmissimu'r of Parents and Trademarks 

1. In an apparatus for winding a web of sheet material and transferring the web from an initial center to surface winding during the winding operation, a spool for the web, a surface winding drum, power means rotatably driving said surface winding drum at the speed of linear travel of the web, a pair of primary arms for carrying said spool for rotation about an axis parallel to and spaced radially from the surface of said surface winding drum and moving said spool about the axis of said surface winding drum into position to be wound from the surface thereof, support means supporting said spool in said primary arms out of contact with said surface winding drum and bringing said spool and the center wound web thereon into engagement with said surface winding drum, power means rotatably driving said spool, means for severing the web at the termination of a surface winding operation, a nip defining enveloper roll cooperating with said winding drum to partially envelop the spool with the web, tensioning means for the web as trained about said nip defining enveloper roll, the tensioning means including a pair of swing arms pivoted for movement about an axis spaced from the axis of said nip defining roll, means supporting said nip defining enveloper rolL on said swing arms, a second pair of swing arms pivotally mounted for movement about an axis spaced beneath and at the incoming side of said nip defining enveloper roll, a tension roller supported on said second swing arms adjacent the upper ends thereof, a link pivotally connecting the adjacent ends of said swing arms to swing together, an idler freely rotatable about a fixed axis spaced on the same side of the axis of said tension roll as the axis of pivotal movement of said firstmentioned swing arms, and fluid pressure means for moving said swing arms and tension roll relative to said idler.
 2. The apparatus of claim 1, wherein the means supporting said nip defining roll on said first-mentioned swing arms includes means for moving said nip defining roll along said swing arms in accordance with the positions of said swing arms relative to said primary transfer arms.
 3. The apparatus of claim 1, in which the means for adjustably supporting said nip defining roll on said first-mentioned swing arms comprise fluid pressure operated cylinder and piston means.
 4. The apparatus of claim 3, wherein the fluid pressure operated means for moving the swing arms relative to the spool comprise fluid pressure cylinder and piston means operable to move said swing arms into position to position said nip defining roll to envelop the spool with the web.
 5. The apparatus of claim 4, wherein smoothing means extend between said knife arms beneath and along the knife supported thereby for tucking the web to completely envelop said spool and smooth the web as wound thereon.
 6. The apparatus of claim 1, wherein the power means for rotatably driving said spool from its axis as supported by said primary arms comprises an extensible slip belt drive.
 7. The apparatus of claim 6, wherein the slip belt drive includes a spool drive pulley coaxial with the spool and having driving connection therewith, an endless belt having a drive pulley and an idler pulley training the belt to extend beyond opposite sides of said spool drive pulley and a tension idler accommodating said spool drive pulley to form a bight between said belt drive pulley and said idlers as the spool is in a retracted position, and accommodating retraction of said bight during transferring movement of said spool by said primary arms to said surface winding drum.
 8. The apparatus of claim 7, wherein the tension idler is loaded by fluid under pressure to maintain a uniform tension on the belt in the various positions of the spool drive pulley relative to the winding drum during transfer of the spool to be wound by surface winding.
 9. The apparatus of claim 8, wherein the tension idler is rotatably mounted between movable take-up arms, wherein the take-up arms are pivoted for movement about a fixed axis at their ends opposite the take-up idler and wherein fluid pressure cylinder and piston means hold said arms in position about their pivotal axes and provide a pressure loading means for said tension idler.
 10. The winding apparatus of claim 1, wherein the support means at the incoming side of said winding drum comprise cam means supporting the spool out of contact with said winding drum as moved by said primary arms about said winding drum to index the spool from center to surface winding.
 11. The apparatus of claim 10, wherein the cam means have arcuate cam faces spaced radially from said winding drum and means are provided for selectively moving said cam faces relative to the periphery of said winding drum to position said spool and the web thereon for surface winding to the required diameter.
 12. The apparatus of claim 11, wherein the cam means are pivotally mounted at opposite ends of said winding drum for movement about transverse axes spaced above and radially of said winding drum, and wherein fluid pressure means are provided to move said cam means about said pivotal axes toward and from said winding drum in accordance with the position of said spool and primary arms relative to said wiNding drum, to maintain the spool and web thereon free from said winding drum during center winding.
 13. The apparatus of claim 12, including primary fluid pressure means biasing said primary arms to vary the pressure of engagement of the roll being wound on said spool with said winding drum in accordance with build-up of the roll.
 14. The apparatus of claim 13, wherein a cut-off knife is disposed between said nip defining enveloper roll and said winding drum and comprises a pair of pivoted curved scythe-like arms partially encircling the spool when in position for severing of the web and having a knife blade extending thereacross, and fluid pressure means pivotally connected with said arms for moving said arms and knife blade about the pivotal axis of said arms to slit the web as said nip defining roll is in nip engagement with said spool. 